The phrase "a complex task requiring" is correct and usable in written English.
It can be used when describing a task that involves multiple steps or skills and necessitates specific requirements or resources to complete.
Example: "The project involves a complex task requiring extensive research and collaboration among team members."
Alternatives: "a challenging task that demands" or "a difficult task needing".
Urban planning is a complex task requiring multidimensional urban information (spatial, social, economic, etc).
The promotion of healthy families in low-income communities will be a complex task, requiring a larger investment of resources than what has been proposed.
Unravelling the rest of the embargo would be a complex task, requiring changes to countless provisions, spread across many government agencies.
However, introducing user-centric value creation processes at established companies is a complex task, requiring major adaptations to traditional manufacturer-centered business models.
Post-market medical product safety surveillance is a complex task requiring standardized data collection, prompt adverse event reporting mechanisms and appropriate methodologies to identify low frequency safety threats and risk communication.
Assessing alternative ways to re-connect landscapes is a complex task, requiring knowledge of how biodiversity will respond over time to alternative conservation actions, such as replanting, managing areas of natural regrowth or protecting existing habitat.
"The idea that excellence at performing a complex task requires a critical minimum level of practice surfaces again and again in studies of expertise," writes Gladwell in Outliers.
Moving a benefits system from a complex mix of inter-relating instruments to a simpler and more effective set is a hugely complex task, requiring project management skills of a high order and new capability in the front line to make it work.
Thus, proper evaluation of liver safety profiles can be a highly complex task, requiring comprehensive datasets and suitable analysis methods.
Setting up WDM technology today is an expensive and complex task, requiring large equipment that creates space constraints inside a carrier's central office.
One complex task requiring clinicians to actively collect information and decide on a diagnosis is cardiac physical examination.
